Ximin Luo

@gnzlbg no, Debian doesn't ship any riscv-32. we are beginning to ship riscv-64 for some things like gcc, but are blocked on llvm for rustc. Would be nice to eventually...

Thanks for the comments, I'll get around to them at some point. But first I need to understand this crate better before proceeding with this PR, since I'm not entirely...

This is being tested on Debian's CI [right now across about 10-13 architectures](https://buildd.debian.org/status/package.php?p=rustc&suite=experimental), we should have an answer in about 24 hours or less. One issue is that the `LLVM_CONFIG`...

Oh and I didn't get around to your comment about not shelling out to `ls` yet but I'll do that when everything else is ready and agreed upon.

Actually, looking again at newer versions of rustc, it seems that it no longer needs the C versions of the intrinsics - feature "rustc-dep-of-std" no longer depends on feature "c",...

Sorry I'm a bit confused. When I said "no longer needs the C versions of the intrinsics" I meant the versions implemented in C by LLVM compiler-rt, that the "c"...

@mati865 Yes I know the source C files are shipped as part of the source release, but they don't appear to be *enabled*. The "compiler-builtins-c" feature you indicated is not...

@mati865 Ah ok thanks, that was the missing link, sorry for the confusion. Then I will finish this PR as discussed above and deploy it in Debian as well. Do...

OK, so I looked into the generated rlib in a bit more detail and I think the current approach won't work, because `rustc-link-lib` ends up including (for some symbols) both...

OK, this version should work and I've added a script to manually check for duplicate symbols. We are waiting on mdsteele/rust-ar#14 however.